What is your advice for how to introduce a new feature to users without using any development?

Besides the obvious ones of posting about changes on your own social media, dev logs, and update notes: 1. Try asking brand ambassadors or power users to post about those features specifically 2. If you can make a comparison to a similar feature on another app, it is a good way to "teach" users how it works 3. Word of mouth! 4. Newsletters, ProductHunt, reddit!